U drive it missions gone wrong after Network Addon Mod is installed

[haipong 0]

 I have recently installed the June 2009 NAM and have found that U drive it missions are no longer working: The intersection between a railway and a road is no longer possible to drive (even though you used to be able to). Similarly, I cannot drive on the roads passing under certain overpasses. Attempting to do so results in the mission terminating and the advisers/Dr Vu getting angry with you. Why is this and can it be corrected? Thanks in advance.

[Xyloxadoria 1,099]

This most likely happens becsue you have the left hand version of the game and installed the NAM to be right hand (or the other way around)

Un-install the NAM and then see what side of the road your sims drive on. If they drive on the left, you will have to re-install the NAM. When you go to install it make sure you check the left hand drive option. You will need to pick custom install to do so,

Also, look at the other options there as well becsue there are somethings that will  only be installed if you select to do so,